Borussia Dortmund may choose Sven Köhler to strengthen the defense. The 29-year-old midfielder is transfer-free on the market. Köhler has already played 69 games in the 2. Bundesliga for VfL Osnabrück and Eintracht Braunschweig. He is also interested in Dinamo Bukarest and Motor Lublin, but the decision whether he will switch to the 3. Liga or abroad will likely fall between the 2. Bundesliga and the abroad. Köhler is an experienced midfielder who could be used in the defense. The 1.85m tall right-footed player has already gained experience in the defense and could be a good new addition for Borussia Dortmund. The coach Heiko Vogel already has enough alternatives in the defense, but a new addition for the defense could still be helpful.